Warp stop mechanism for looms



April 6 1926.

C. D. BROWN WARP STOP MECHANISM FOR LOOMS 2 Sheets-Shoot 1 Filed Dec. 5. 1925 UIIIII. llll /v l/EN TQ R ATTORNEY 1 CARL Patented Apr. 6, i926.

TION, ornomnn'nnn, MASSACHUSETTS, A CORPORATION or MAINE.

wmrsroreuncnamsmiroa LOOMS.

I Application filed December To all, whom it may eonc'ernpi Be it known that I, CARL 1), BROWN, a

citizen of the United States, anda resident] of Hopedale, in the county otlVorcester and Stateof Massachusetts, Improvement in Warp Stop Mechanisms for Looms, of which the following description,

in connection w th the accompanying; drawdrawings representing like parts.-

This invention relates to Warp stopmech: anisms for looms whereby upon the occur: rence of a faultin the warp' threads the loomwill be stopped. I

It is now the commonpractice to provide looms with warp stopmechanisms which are usually, though notalways, placed between the whip roll and shedding .mechanism or heddle frames. Such warp stop mechanisms have been provided with warp supports and drop wires which-are sustainedby tact warp. threads during weaving,and on the occurrence of a warp fault,- a-v detector mechanism has been in-fluencedbythedrop wire which fails tobe supported byits warp ings, is a specification, like characterson the thread, and through such detector 'mecha-.

nism the loom is stopped.

here the warp stop vmechanism is plac ed' between the whip roll and shedding mechadifierent looms, or,

disturbs the support ,of the warp nism, the Varying positions of the whip roll, sometimes high and sometimes lowin indeed, in the same loom, threads by the warp supports,and perforce, also, may sustain the drop wiresin improper relation to the-cooperating parts... I .I'

.Inlooms of this general type it is desir-f able that the plane of e the warp threads as of the warp stop mechanism, with the plane passing through the. warp supports, and an object of-the present in vention, therefore, is to 'provide means whereby the warp stop mechanism as a whole, including 1 the warp supports, may. be angularly disposed .in' accordance. with the height of the whip roll and the plane threads as they passthroughthe warp stop mechanism shall lie in the plane of the warp supports. e i a f In accordance with the present invention in one aspect thereof,-the warp stopv mechav nisin as a whole, including the have invented an formed Onthe arc' of a circle,

the in and at oi" the warp threads between the whip roll and shedding mechanism,-so that thewarp of the loom, said arms 3, 1 25 Sam no. 72,966.

warp supports, 1s mounted upon side frames, one at each 1e 1 of the loom, each provided with 1). BROWN, or nornnanm massncnzisn'r'ransslonon 'ro Danna conronaa web having an arcuate guide, preferably p the center of which in the, plane passing through the warp. supports, mounted upon I side of the loom, provided with complemental guides for directing. the angular inovemjent ,o tthe warp ,stop' mechanism about the center of the arc, and securing means, such as bolts, are provided for securing the ane of; the

and such side framesare side supports, one ateach side frames and lsidej, supports in their 00 related angular relation to bringthe plane describedin connection with. a warp stop inecha-nismof the general type of that disclosed injthe Davisvan d Johnson Patent, No.

7 25i 7 5' .The invention and lowing description .and the accompanying drawings of one good form thereof.

7 Inthe drawings Figul is a sidevview of a loom and warpstop mechanism provided with the present invention, some of the partsbeing shown in sectionnndothers broken away; '1 V v :Fi .fQLis an enlarged frontelevation at onesidelof the ,war stop mechanism, some o fthelparts', being s, own in section; and

Fig'., 3 is ing more particularlytherside frames of the warp stop. mechanism and side supports'in their. co-related"relationffor angular adjustment-Ofihe warp stop mechanism. h v ,The looniframe l, partly, shown in Fig. 1 may be of any usual type or construction the rear portion thereof. has, as usual, bearings'for the support of the warp beam 21 on which the warp threads a are wound; Rising from the loom. frame are the brackets 3, shown in the present instance asone convenient form of meansfor supporting the whip roll, The whip rolls may be of any usual type or construction, but in the present instance it is shown as mounted, upon the a msbo, one at each side erng studs or shaft 6. From thewhip roll 4 the warp threads a extend front-wardly of the V new icombination (if parts-will best be made clear from the 01- an enlarged sidefclevation'showsecured to the r loom through the warp stop mechanism, to be hereinafter described, and frontward of the warp stop mechanism the warp threads pass through the shedding mechanism, as

usual, which in the present instance is l thereon the brackets 9, to the top portion 10 of which are secured the bearing arms 11, one at each. side of the loom, and held to their respective brackets by means such as the bolts 12. Each of the bearing arms 11 has the elongated bearing 13 in which is adjustably mounted the post 14 which may be secured in vertically adjusted position by means of the set screws'15.

Surmounting each of the posts 14 is a crown piece, constituting the side supports for the side frames of the warp stop mecha nism, and each comprising a socket portion 16 secured to the posts by a set screw 17. EX- tending upwardly from the socket portion 16, the crown piece is provided with a flange or web 18, preferably curved as shown, the arcuate guide 19, Fig. 2, and the bolts 20, for a purpose as will presently appear.

The warp stop mechanism as herein shown comprises the side frames 21, one at each side of the loom, and such side frames between them carry the warp stop mechanism. Each side frame is provided with warp bar supporting sockets 22 on its inner face, in which rests the warp support 23 extending transversely of the loom between the side frames. A1; the front portion of theside frames is another warp support 24, shown in this instance as a bar extending between the side frames, and on the two warp sup ports 23 and 24 the warp threads should rest during weaving, consequently the plane extending between the top of the warp supports 23 and 24 should be in the plane of the warp threads leading between the whip roll and the shedding mechanism.

Under certain conditions of weaving and with certain kinds or characters of thread constituting the warp or in different looms, the whip roll occupies different positions. Sometimes it is higher, in the use of some warps, or in some looms, and at other times it is lower; consequently this variation in the position of the whip roll will vary the plane of the warp threads leading between the whip roll and the shedding mechanism, and in the absence of means to properly position the warp stop mechanism, and particularly the warp rests thereof, the warp threads will be bent over one or the other of the warp rests and consequently not properly maintain the drop wires in their supported position by the warp threads.

Each of the side frames 21 is provided with a depending flange25 which is provided with an arcuate guide 26, Figs. 2 and 3, formed on the arc of a circle correspondlng to the arcuate guide 19 of the crown piece, the arc of said guide being formed preferably about a center in a plane passing through the warp supports 23 and 24. In the present instance of the invention, the arcuate guide 19 is shown as a depression in the flange 18 of the crown piece, which is engaged by the arcuate guide 26, shown as a projection on the flange or web of the side frames. Each of the side frames is provided with slots 27 through which pass the bolts 20 and by which the side frames and crown piece are secured in operative position. By manual manipulation of the bolts, that is, by loosening the nuts 28, the warp stop mechanism as a whole may be angularly adjusted in conformity with the plane of the warp threadsextending between the whip roll and shedding mechanism. This condition is indicated in Fig. 1 wherein the warp stop mechanism is shown as adjusted to conform to the plane of the warp threads when the whip roll is higher than usual.

The warp stop mechanism, as indicated, is of the general type of that shown and described in the Davis and Johnson patent, previously referred to herein, but in conformity with the present invention, the parts of the warp stop mechanism are all carried by the adjustable side frames 21. Mounted in the side frames for movement transversely of the loom are the toothed detectors 29, Fig.

2, which pass through the usual slots formed in the drop wires 30, and connecting the movable toothed bar 29 with the actuators 31, of which there are four in the present instance, are the links 32, the construction being such that should the actuators'31 be actuated or moved in a direction transversely of the loom, the connected toothed bar or detector will be likewise actuated.

Extending outwardly from one of the side frames 21 are the brackets or arms 33 in which is mounted the shaft 34 carrying the rocker 35 on which are mounted the actuators 31. Each actuator 31 has two fulcra 36 by which it is supported upon the rocker 35, and a. spring 37 normally holds the actuators 31 in operative engagement with the rockers, as indicated in Fig. 2, with permissive movement, nevertheless, about one of its fulcra 36.

Pivotally mounted at 38, Fig. 2, is the finger 39 having a pin 40 which is engaged with the associated actuator 31, the construction being such that should the actuator 31 be arrested in its movement, itwill turn about one or the other of the fulcrum points 36 and move the outer end of the finger 39 downwardly, in the present instance. The outer end of the finger 39 rests upon a finger described in son, and the ment, the associated stop "finger 39 ll'pivotally mounted at 42, as more fully the patent to Davis andldohnfinger 41 bears upon the end of the flexible wire 13 within the sheath let, the

construction being such that should any one of-the actuators 31 be arrested in its movew ll act upon the 'fingerell to move the flexible wire 43 in itssheath to effe'ctl'oom stoppage, substantially as morefully described 111 the Davis and Johnson patent. 7

It'will be noted that the parts'of the warp "stop mechanism above described are all "mountedupon the adjustable side frame 21 move with it when its anand consequently I changed to bring the plane gular relation is of the warp supports into the plane of the "warpthrea'ds. g The rocker 35 is connected to an armj4t5 carrying a link46hav'ing a pin and slot connection at 47 with 'thearm '45, and-said link 46- is connected to .arod 48 leading to afcam actuated by a H going part of the 1 nachine,fas usual. r

Should the relative positions of the whip "-roll and shedding mechanism be changed from a horizontal'to anincline, either upwardly or downwardly, the warp stop'mechanism maybe relatively adjusted angularly with, relation to their support-s'to bring the. lane of the warp rests into the, inclined p ane assumed byfthe Warpthreads, so thatthe warp threads will always rest upon the warp supports, and such angular adjustment of the warp stop mechanism combined with its vertical ad-' justment, as hereinbefore described, readily 1 ditions, in conformity with adapts the warp stop mechanism to all conthe plane of the warp threads, either upwardly or downwardly, or on an incline. Ohly twowarp supports are herein shown and described as extending between the side frames of the warp stop mechanism, but it is to be understood that any suitable number of warpsupports may be employed tosustain the warp threads on their passage through the warp stop mechanism. When the plane of the warp threads is relatively high, the side a Vertical direc- 1. In a warp stop mechanism for looms, the combination of a whip roll and shedding I mechanism, a side frame at each side of the loom between the whip roll and shedding the'side frames of i' I j mechamsm between them, side frames"on mechanism, warp supports extendihg' 'betweenthe side frames,'a series ofdrop wires I and adrop wire detector supported by the side frames,- a stop finger and transmitter carried by a side frame, a support for each of theside frames, said'side framesand supports having interengagingarc guides, and

means for securmg thesidejframes in different angular adjustments-to accord with I the plane of the war threads extending be tween the whip rol and shedding mecha nism.

mu: and shedding mechanism, a warp stop mechanism between :them including side frames, drop wires and a drop wire indicator, warp supports extending between the side frames, a web extending from each side frame, a support atea'ch side of the loom,

said side frames and supports havingre'gis' tering arc-shape guides'for dlrectmg angu- 2.': In a loom,'-'the combinationof a whip lar movements ofthe side frames to place the warp supports in the plane of the warp *threadsbetween'the whiproll and the shed ding mechanism,and means for securingthe partsin related position. 1

3. In a loom, the combination of a whip roll .and shedding mechanism, warp stop which the'warp. stop mechanismlis' sup-ported, each of theside' frames havin'g' aweb provided with an arcuate guide, a support for the'side 'frames' at each side of the m provided with a complemental arcuate guide for directing the angular movements of the side frames, and means for securing the side frames and supports together n related angular position in accordance with "theplane of the warp threads.

' 4. In a loom, the combination of the whip roll and shedding mechanism, warp stop mechanism and side frames therefor between the whip roll and shedding mechanism, each side frame having a depending web provided with an arcuate guide, a suploom havinga complemental arcuate guide, curved slots in one of said arcuate guides, and bolts for securing the side frames to their supports in angular relation in con-- formity with the plane .of the warp.v threads between the whip roll and shedding mechanism. v

5. In a loom, the combination of the whip roll and shedding mechanism, warp stop p0rtfor the side frames at each side ofthe mechanism and side frames therefor between the whip roll and shedding mechanism, each side frame having a depending web provided with an arcuate guide, a support for the side frames at each side of the loom having a complemental arcuate guide, curved slots in one of said arcuate guides, posts at each side of the loom sustaining the supports, and

bolts for securing theside frames to their supports in angular relation in conformity frames having a web provided with a guide formed on the arc of a circle whose center is 111 the plane passmg through the warp supports, a support at each side of the loom for the side frames and provided with a guide of similar curvature, and means for securing the side frames to the supports in angular relation to place the plane of the Warp sup ports in the plane of the warp threads between the whip roll and shedding mechanism.

7. In a loom, the combination of the whip roll and shedding mechanism, warp stop mechanism and side frames therefor between the whip roll and shedding mechanism including warp supports, each of the side frames having a web provided with a guide formed on the arc'of a circle whose center is in the plane passing through the warp supports, a support at each side of the loom for the side frames and provided with a guide of similar curvature, vertically adjustable parts carrying said side frame supports, and means for securing the side frames to the supports in angular relation to place the plane of the warp supports in the plane of the Warp threads betweenthe whip roll and shedding mechanism.

8. In a warp stop mechanism for looms, the combination of side frames having depending webs provided with a curved'guide and adapted to support the parts of the warp stop mechanism, an adjustable post at each side of the loom, a crown piece surmounting each post and provided with a curved guide for engagement with the curved guide of the side frames, one of said guides having curved slots and the other carrying bolts engaged with the slots for securing the side frames to the crown pieces in angular relation in conformity with the plane of the warp threads.

9. In a loom, the combination of the whi roll and shedding mechanism, a warp stop mechanism therebetween including side frames, a drop wire detector carried by the side frames, an actuator for the detector mounted upon one of the side frames, a Web carried by each side frame and having an arcuate guide, a side support for each side frame having a'complemental arcuate guide for directing the angular, movements of the side frames to place the warp supports in the plane of the warp threads, and means for securing the side frames in their angular related position.

In testimony whereof, I have signed my name to this specification;

CARL D. BROWN. 

